title: Experimental demonstration of coherent OCDMA using heterodyne detection.
abstract: We present the first experimental demonstration of a practical, fully coherent, optical code division multiple access (OCDMA) scheme that can fully suppress multiple access interference (MAI) and speckle noise without phase locking or thresholding and gating. The scheme is sourced from an optical comb generator and uses spectral phase encoding and a heterodyne receiver with balanced detection. Here we present results for a four-user configuration at 50% load. At 4.5 Gbits/s per user, the system achieves a signal to MAI ratio of 648 at a bit error rate of 10(-7).
authors.affiliation: Department of Electrical and Computer Engineering, The Johns Hopkins University, 3400 N. Charles St., Barton 105, Baltimore, Maryland 21218, USA.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yang
authors.forename: Keith G
authors.initials: KG
authors.lastname: Petrillo
authors.forename: Hong-Fu
authors.initials: HF
authors.lastname: Ting
authors.forename: Jacob B
authors.initials: JB
authors.lastname: Khurgin
authors.forename: A Brinton
authors.initials: AB
authors.lastname: Cooper
authors.forename: Mark A
authors.initials: MA
authors.lastname: Foster